Humanoid robots vs reality: iRobot pioneer says the revolution may look nothing like investors expect

When iRobot Corporation (NASDAQ: IRBT) went public, it represented one of the earliest consumer-facing bets on robotics. Nearly two decades later, the company’s co-founder Rodney Brooks is sounding an alarm about the current wave of humanoid robot hype. Brooks, who is also an MIT roboticist and the mind behind Rethink Robotics, has warned that investors may be chasing unrealistic promises. His critique comes at a pivotal moment, with Tesla Inc. (NASDAQ: TSLA), Agility Robotics, and a host of startups such as Figure attracting billions in capital with claims that human-like machines are just around the corner.

Why did Rodney Brooks warn investors about humanoid robots now?

Brooks’ intervention is timely because humanoid robots are enjoying their hottest hype cycle since the DARPA challenges of the 2000s. Videos of bipedal machines opening doors, stacking boxes, or dancing often go viral. Yet Brooks argues that these demonstrations mask how far away commercial viability really is.

He singles out approaches that rely on training robots by feeding them video data of humans performing tasks. In his view, such shortcuts are based on “fantasy thinking.” Human hands contain nearly 17,000 tactile sensors that allow nuanced grip, slip detection, and pressure regulation. Replicating even a fraction of this requires breakthroughs in haptic engineering that do not yet exist. Brooks also highlights the physics of balance: a humanoid robot falling just a few feet could deliver enough kinetic energy to injure people nearby. That raises serious safety barriers for workplace or household deployment.

Brooks adds that in 15 years, robots that succeed commercially may not look like humans at all. Instead, they could be wheeled, multi-armed, or designed in non-anthropomorphic shapes optimized for efficiency. This would mark a break from the idea that humanoids are the inevitable endpoint of robotics evolution.

What does this mean for iRobot (NASDAQ: IRBT) stock and sentiment?

Although Brooks no longer runs iRobot, his comments resonate given the company’s precarious financial position. iRobot’s second-quarter results in 2025 showed revenues under pressure and operating margins at negative 32.6 percent. Cash reserves declined to about $40 million, down from nearly $70 million in the prior quarter, raising questions about its survival as a going concern. The board has already initiated a strategic review to explore restructuring options.

Investor sentiment mirrors these struggles. iRobot trades at an enterprise value to sales multiple of 0.38×, far below its historical average of around 0.78× and well beneath the robotics sector median of 4.7×. Short interest sits at nearly 27 percent of float, with a recent increase of 13 percent, reflecting bearish bets. Days to cover hover at four, suggesting high pressure from traders expecting further downside.

Institutional ownership remains heavy at around 77 percent, showing that large funds still hold stakes, but those positions may be defensive rather than conviction buys. Analyst coverage has tilted toward “hold” or “sell” ratings, with very few calling iRobot a buy. For retail investors, the stock may appeal only to those with high risk tolerance willing to gamble on a turnaround story.

How does this warning fit into past robotics hype cycles?

Robotics has always swung between dazzling promise and disappointing reality. The DARPA Grand Challenges, Boston Dynamics’ acrobatics, and SoftBank’s Pepper robot all generated excitement, but scaling into profitable businesses proved elusive. Google once embarked on a spree of robotics acquisitions in the 2010s, only to quietly divest many assets when commercialization lagged.

Brooks’ comments echo those earlier cautionary tales. He has long advocated behavior-based robotics, which emphasizes simple, reactive control systems rather than grandiose AI mimicry of human thought and motion. The lesson investors should recall is that most robotics companies stumble not because they lack vision, but because they underestimate the gulf between controlled lab demos and messy, unpredictable real-world environments.

Which robotics models are most likely to generate returns for investors?

If humanoids are overhyped, then where should investors look? The strongest returns to date have come from robots optimized for narrow functions. Warehouse automation systems, robotic arms for electronics assembly, and delivery bots are examples where companies have achieved viable business models.

Brooks believes this is the near-term path forward. Specialized robots with wheels, multiple arms, or modular sensors can achieve efficiency without replicating the human body. For investors, this means backing startups and companies that prioritize incremental, verifiable milestones—safety certifications, energy efficiency, and predictable deployment—rather than dramatic but impractical humanoid visions.

Venture capital is already shifting. Funding has increased for logistics robotics, agriculture robots, and surgical robotics, areas where the environments are structured enough for machines to thrive. In contrast, humanoid startups with valuations in the tens of billions risk becoming the WeWorks of robotics if revenue fails to materialize.

Why are valuations so stretched in humanoid robotics?

Brooks’ warning gains urgency because valuations have escalated at a pace that recalls past bubbles. Figure, a startup developing general-purpose humanoids, was recently valued at $39 billion, despite no large-scale commercial deployment. Investors often justify such valuations by pointing to potential labor shortages and the promise of humanoids to fill gaps across industries.

But as Brooks notes, manufacturing capacity is not the bottleneck—control systems, tactile sensing, and safety remain unsolved. If these fundamentals do not advance, capital may be misallocated for years. That creates risk not just for venture funds, but for public market investors exposed to companies that tie their growth stories too tightly to humanoid timelines.

Can iRobot rebound, or is IRBT still a sell?

The market has effectively priced iRobot for distress. With its shares trading at deep discounts to sector peers, any credible progress on restructuring, new product launches, or cash flow stabilization could spark a relief rally. But analysts caution that this is a high-risk, event-driven play.

Institutional sentiment, combined with heavy short interest, suggests volatility ahead. A positive surprise—such as a buyout offer, strategic partnership, or refinancing—could trigger a sharp upside move. Conversely, continued cash burn could push the company closer to insolvency. Investors weighing IRBT today must decide whether the asymmetry of potential outcomes justifies the risk.

What lessons should robotics investors take from Brooks’ warning?

The strongest lesson is to ground optimism in physics, not marketing. Investors should scrutinize whether companies can demonstrate reproducible dexterity, safe balance, and energy efficiency outside of controlled demos. Founders should articulate phased roadmaps with clear milestones rather than futuristic promises.

For the robotics industry, Brooks’ message may ultimately help. By tempering unrealistic expectations, the sector could reallocate capital toward ventures that solve specific, high-value problems. Success in logistics, healthcare, and industrial robotics could lay the groundwork for more advanced systems in the future.

Humanoid robots may remain aspirational icons, but function-first robots will likely deliver the next generation of investor returns. As Brooks makes clear, the revolution may not fade entirely—it may simply look very different from what Silicon Valley pitch decks currently suggest.